app/sources/serverconn.cpp

/*
    blueROCK - for digital rock
    Copyright (C) 2019  Dorian Zedler

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "headers/serverconn.h"

ServerConn::ServerConn(QObject *parent) : QObject(parent)
{
}

QVariant ServerConn::getWidgetData(QVariantMap params){
    QString requestUrl;
    if(params["nation"].toString() == "ICC"){
        requestUrl = "https://ifsc-egw.wavecdn.net/egw/ranking/json.php?";
        params["nation"] = "";
    }
    else if (params["nation"].toString() == "GER") {
        requestUrl = "https://www.digitalrock.de/egroupware/ranking/json.php?";
    }
    else if (params["nation"].toString() == "SUI") {
        requestUrl = "https://www.digitalrock.de/egroupware/ranking/json.php?";
    }
    else {
        params.remove("nation");
        requestUrl = "https://www.digitalrock.de/egroupware/ranking/json.php?";
    }

    for(QVariantMap::const_iterator iter = params.begin(); iter != params.end(); ++iter){
        requestUrl += iter.key() + "=" + iter.value().toString() + "&";
    }

    requestUrl = requestUrl.left(requestUrl.length() - 1); // remove last '&'

    qDebug() << requestUrl;

    QVariantMap ret = this->senddata(QUrl(requestUrl));

    if(ret["status"] != 200){
        // request was a failure
        return QVariantMap({{"status", ret["status"]}, {"data", ""}});
    }

    QJsonDocument jsonReply = QJsonDocument::fromJson(ret["text"].toString().toUtf8());

    QVariantMap data = {{"status", 200}, {"data", jsonReply.toVariant()}};

    return data;
}

// ------------------------
// --- Helper functions ---
// ------------------------

QVariantMap ServerConn::senddata(QUrl serviceUrl, QUrlQuery pdata)
{
    // create network manager
    QNetworkAccessManager * networkManager = new QNetworkAccessManager();

    QVariantMap ret; //this is a custom type to store the return-data

    // Create network request
    QNetworkRequest request(serviceUrl);
    request.setHeader(QNetworkRequest::ContentTypeHeader,
                      "application/x-www-form-urlencoded");

    //QSslConfiguration config = QSslConfiguration::defaultConfiguration();
    //config.setProtocol(QSsl::TlsV1_2);
    //request.setSslConfiguration(config);

    //send a POST request with the given url and data to the server

    QNetworkReply *reply;

    if(pdata.isEmpty()){
        // if no post data is given -> send a GET request
        reply = networkManager->get(request);
    }
    else {
        // if post data is given -> send POST request
        reply = networkManager->post(request, pdata.toString(QUrl::FullyEncoded).toUtf8());
    }

    // loop to wait until the request has finished before processing the data
    QEventLoop loop;
    // timer to cancel the request after 3 seconds
    QTimer timer;
    timer.setSingleShot(true);

    // quit the loop when the request finised
    loop.connect(networkManager, SIGNAL(finished(QNetworkReply*)), SLOT(quit()));
    // or the timer timed out
    loop.connect(&timer, SIGNAL(timeout()), &loop, SLOT(quit()));
    // start the timer
    timer.start(10000);
    // start the loop
    loop.exec();

    //get the status code
    QVariant status_code = reply->attribute(QNetworkRequest::HttpStatusCodeAttribute);

    ret.insert("status", status_code.toInt());

    //get the full text response
    ret.insert("text", QString::fromUtf8(reply->readAll()));

    // delete the reply object
    delete reply;

    // delete the newtwork access manager object
    delete networkManager;

    //return the data
    return(ret);
}

// -------------------------
// --- Functions for QML ---
// -------------------------